Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is Rack awareness?

787

How will format the HDFS ?

733

what are the steps involved in commissioning adding

726

How to use Apache Zookeeper command line interface?

824

Can NameNode and DataNode be a commodity hardware?

1510

What are the steps to submit a Hadoop job?

723

What is the heartbeat used for?

820

How would you tackle counting words in several text documents?

857

What are the Basics of Hadoop?

767

Explain the shuffle?

725

How blocks are distributed among all data nodes for a particular chunk of data?

846

How can I install Cloudera VM in my system?

759

How we can take Hadoop out of Safe Mode?

IBM,

695

What is Writable & WritableComparable interface?

756

What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

827

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Un-Answered Questions { Apache Hadoop }

Have you ever used Counters in Hadoop. Give us an example scenario?

837

What are the most commonly defined input formats in Hadoop?

856

What is a Record Reader in hadoop?

793

when hadoop enter in safe mode?

554

What is Distributed Cache?

721

What is the sequencefileinputformat in hadoop?

529

What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

1016

what is difference between int and intwritable?

1199

What is DistributedCache and its purpose?

735

How many instances of tasktracker run on a hadoop cluster?

513

What happens to job tracker when namenode is down?

508

Why is hadoop faster?

466

what is SPF?

1312

Virtual Box & Ubuntu Installation?

736

Does hadoop always require digital data to process?

932

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